G'day, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
Waitomo Glowworm Caves
Valid Reviews
290 Valid Reviews
The Waitomo Glowworm Caves experience has a total of 291 reviews. There are 290 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 290 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
12% |
| 9/10 | 52 |
|
18% |
| 8/10 | 81 |
|
28% |
| 7/10 | 66 |
|
23% |
| 6/10 | 22 |
|
8% |
| 5/10 | 13 |
|
4% |
| 4/10 | 8 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
1% |
| 1/10 | 3 |
|
1% |
75.62% Average
The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.62% and is based on 290 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
263 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 290 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 263 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
11% |
| 9/10 | 49 |
|
19% |
| 8/10 | 76 |
|
29% |
| 7/10 | 57 |
|
22% |
| 6/10 | 21 |
|
8% |
| 5/10 | 13 |
|
5% |
| 4/10 | 7 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
2% |
| 1/10 | 2 |
|
1% |
75.36% Average
The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.74%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Somysolanki | 7/10 | 587 days | 100% |
| Anne | 7/10 | 922 days | 64% |
| ros fraser | 4/10 | 2932 days | 2% |
| wynden | 1/10 | 2960 days | 2% |
| Rado Hank | 10/10 | 3047 days | 3% |
| Lizzie Edmonds | 8/10 | 3048 days | 3% |
| Anis Quentin | 7/10 | 3055 days | 3% |
| Jeny Smolders | 7/10 | 3059 days | 3% |
| Oscar Petersen | 8/10 | 3066 days | 3% |
| Ani | 9/10 | 3174 days | 3% |
| Martin Murlik | 8/10 | 3287 days | 3% |
| Laura | 9/10 | 3298 days | 3% |
| Melanie Farrell | 7/10 | 3306 days | 3% |
| Andy | 10/10 | 3313 days | 3% |
| Julia Achatz | 5/10 | 3327 days | 2% |
| Auba Mateos | 7/10 | 3333 days | 3% |
| Charlotte | 7/10 | 3333 days | 3% |
| Isabel Zedelius | 8/10 | 3336 days | 3% |
| Dries | 8/10 | 3376 days | 3% |
| Clarissa Glaser | 8/10 | 3377 days | 3% |
| Alna | 10/10 | 3382 days | 3% |
| Holger Worner | 9/10 | 3382 days | 3% |
| Karlee Hormell | 9/10 | 3391 days | 3% |
| Alonso | 9/10 | 3395 days | 3% |
| Rose Guillaume | 8/10 | 3398 days | 3% |
| Caroline Coudray | 8/10 | 3402 days | 3% |
| Barbara | 8/10 | 3402 days | 3% |
| Leonie Brabers | 7/10 | 3410 days | 2% |
| Bina Johansson | 10/10 | 3410 days | 3% |
| Sam Staines | 9/10 | 3414 days | 2% |
| Erik | 6/10 | 3417 days | 2% |
| Nicole Signer | 8/10 | 3424 days | 2% |
| Sam Taylor | 7/10 | 3428 days | 2% |
| Vanuxem | 8/10 | 3632 days | 2% |
| Clara Bertomeu | 10/10 | 3632 days | 2% |
| Lukas Boller | 9/10 | 3634 days | 2% |
| Mette Elholm | 7/10 | 3648 days | 2% |
| Mathilde Arp | 8/10 | 3648 days | 2% |
| Chloe and Guillame | 9/10 | 3652 days | 2% |
| Andre | 9/10 | 3654 days | 2% |
| Doerte | 10/10 | 3654 days | 2% |
| Saskia Peek | 9/10 | 3655 days | 2% |
| Erika Tarant | 8/10 | 3655 days | 2% |
| Jennifer Nguyen | 7/10 | 3656 days | 2% |
| Julie Duvert | 7/10 | 3656 days | 2% |
| Dan Ramsl | 4/10 | 3656 days | 1% |
| Lucy Mulvin | 7/10 | 3657 days | 2% |
| Fine Kochling | 9/10 | 3659 days | 2% |
| Eberhard | 9/10 | 3659 days | 2% |
| Hannes | 8/10 | 3660 days | 2% |
| Calum Penn | 9/10 | 3662 days | 2% |
| Arthur Portolleau | 6/10 | 3663 days | 2% |
| Elisabet | 10/10 | 3664 days | 2% |
| Tommy Mannien | 8/10 | 3665 days | 2% |
| Solange Bourbeois | 8/10 | 3668 days | 2% |
| Talissa Missiato | 10/10 | 3668 days | 2% |
| Severin Knegsch | 9/10 | 3669 days | 2% |
| Pierre Jouffineau | 10/10 | 3670 days | 2% |
| Lewis Whittle | 8/10 | 3672 days | 2% |
| Ben and Pauline | 8/10 | 3674 days | 2% |
| Ann-Kathrin | 7/10 | 3679 days | 2% |
| Natasha Harbinson | 10/10 | 3680 days | 2% |
| Sebastian | 2/10 | 3681 days | 1% |
| Jaquein Bucholz | 3/10 | 3681 days | 1% |
| Chiara | 7/10 | 3681 days | 2% |
| Cariotta Kemper | 3/10 | 3681 days | 1% |
| Megan Lenox | 7/10 | 3684 days | 2% |
| Max Mustermann | 8/10 | 3686 days | 2% |
| Amy Stafford | 8/10 | 3689 days | 2% |
| Carl | 7/10 | 3689 days | 2% |
| Briony | 7/10 | 3691 days | 2% |
| Melanie Kronbichler | 8/10 | 3692 days | 2% |
| Andreas Schiefer | 7/10 | 3693 days | 2% |
| Veronique Kaplan | 3/10 | 3695 days | 1% |
| Robin Ings | 6/10 | 3696 days | 2% |
| Stula Vladimir | 7/10 | 3697 days | 2% |
| David Soukal | 8/10 | 3697 days | 2% |
| Olivia Aliprandi | 7/10 | 3698 days | 2% |
| Isabelle | 2/10 | 3700 days | 1% |
| Jonathan Gourmel | 8/10 | 3700 days | 2% |
| Mikkel Palleson | 4/10 | 3703 days | 1% |
| Franziska and Sabine | 7/10 | 3704 days | 2% |
| Chloe Guerillot | 7/10 | 3704 days | 2% |
| Faye Oliver | 7/10 | 3706 days | 2% |
| Iris Kerbler | 9/10 | 3706 days | 2% |
| Til Schaebitz | 6/10 | 3707 days | 2% |
| Elisabeth Grabner | 9/10 | 3709 days | 2% |
| Berith | 10/10 | 3709 days | 2% |
| Chris Simpson | 6/10 | 3712 days | 2% |
| Pekka and Jonna | 9/10 | 3712 days | 2% |
| Jonas Hoerning | 8/10 | 3713 days | 2% |
| Nils | 10/10 | 3713 days | 2% |
| Mark Rosema | 8/10 | 3714 days | 2% |
| Lisa Huber | 10/10 | 3714 days | 2% |
| Nicola Wiggan | 9/10 | 3735 days | 2% |
| Linda and Gunther | 4/10 | 3736 days | 1% |
| Julie | 9/10 | 3737 days | 2% |
| Maria Schaer | 7/10 | 3741 days | 2% |
| Mette and Jesper | 5/10 | 3743 days | 1% |
| Pierre and Alexandra | 6/10 | 3749 days | 1% |
| Julia Waenninger | 8/10 | 3761 days | 2% |
| Sarah Boettcher | 9/10 | 3797 days | 2% |
| Suzanne Vermeulen | 6/10 | 3814 days | 1% |
| Blandine Giusti | 7/10 | 4017 days | 1% |
| Bart Hanssen | 6/10 | 4096 days | 1% |
| Astrid Egesten | 7/10 | 4147 days | 1% |
| Jean Curry | 9/10 | 4371 days | 0% |
| Carla Oyarzun | 1/10 | 4375 days | 0% |
| Philippe Chiasson | 9/10 | 4381 days | 1% |
| Helma Druyken | 4/10 | 4391 days | 1% |
| Florian Guttler | 7/10 | 4394 days | 1% |
| Casandra Prunica | 8/10 | 4395 days | 1% |
| Lauren Hedley | 7/10 | 4395 days | 1% |
| Janina Zwerver | 8/10 | 4395 days | 1% |
| Marieke Feyteres | 4/10 | 4399 days | 1% |
| van Linda Werner | 5/10 | 4399 days | 1% |
| Philip Donachie | 7/10 | 4409 days | 1% |
| Luisa Bach | 8/10 | 4409 days | 1% |
| Kristina | 7/10 | 4411 days | 1% |
| Eugen Lehner | 6/10 | 4412 days | 1% |
| Manuel Bach | 7/10 | 4412 days | 1% |
| Matthias Freiling | 2/10 | 4419 days | 1% |
| Debora Grusler | 6/10 | 4422 days | 1% |
| Andreas Brodhaeker | 8/10 | 4435 days | 1% |
| Renee van der Syde | 7/10 | 4436 days | 1% |
| Martha Horst | 8/10 | 4436 days | 1% |
| Roland Beer | 7/10 | 4440 days | 1% |
| Johanna Bak | 4/10 | 4440 days | 1% |
| Lior Bakski | 9/10 | 4450 days | 1% |
| Bet | 9/10 | 4451 days | 1% |
| Memain | 8/10 | 4724 days | 1% |
| Konza | 7/10 | 4725 days | 1% |
| Steen Rausmussen | 8/10 | 4756 days | 1% |
| David Restell | 10/10 | 4786 days | 1% |
| Christina Rodewald | 9/10 | 4791 days | 1% |
| Hanneke P | 7/10 | 4817 days | 1% |
| Kohler | 9/10 | 4837 days | 1% |
| Alexandra van den Brack | 6/10 | 4845 days | 1% |
| Paul Lawrence | 9/10 | 4846 days | 1% |
| Abby Rushmer | 7/10 | 4847 days | 1% |
| Stephan Olivier | 7/10 | 4852 days | 1% |
| Stephan Olivier | 7/10 | 4852 days | 1% |
| Faassen | 8/10 | 4856 days | 1% |
| Julie Lamart | 8/10 | 4857 days | 1% |
| Adrian Weidell | 5/10 | 5053 days | 1% |
| Jonathan Tuthill | 9/10 | 5108 days | 1% |
| A Ormsby | 10/10 | 5120 days | 1% |
| Gillian Rowe | 10/10 | 5133 days | 1% |
| Ryan Pynappels | 8/10 | 5134 days | 1% |
| Peter Dellen | 8/10 | 5135 days | 1% |
| Jorg Steffens | 8/10 | 5135 days | 1% |
| Danielle & Jobbe | 9/10 | 5137 days | 1% |
| Christina | 6/10 | 5138 days | 1% |
| Jop Veldhuis | 7/10 | 5138 days | 1% |
| Paul Weidenfeld | 8/10 | 5139 days | 1% |
| Sophie Dorrepaal | 7/10 | 5139 days | 1% |
| Fannette Peyreplane | 5/10 | 5140 days | 1% |
| Norm Cooper | 7/10 | 5144 days | 1% |
| Gloria, Rose & An | 8/10 | 5144 days | 1% |
| A Sorg | 10/10 | 5144 days | 1% |
| Samplonius | 5/10 | 5147 days | 1% |
| Petra | 10/10 | 5147 days | 1% |
| Bethany Hamilton | 8/10 | 5151 days | 1% |
| suffolkhouse69 | 9/10 | 5152 days | 1% |
| a a | 8/10 | 5183 days | 1% |
| Julia Balionis | 7/10 | 5197 days | 1% |
| Julia Hartman | 3/10 | 5198 days | 1% |
| Fabienne Indergand | 7/10 | 5218 days | 1% |
| Waldemar Schuler | 9/10 | 5230 days | 1% |
| pepette31 | 7/10 | 5305 days | 1% |
| Craig Hathaway | 9/10 | 5457 days | 1% |
| Stephane Lebel | 9/10 | 5462 days | 1% |
| Rens Hemselmans | 7/10 | 5475 days | 1% |
| Isabell | 10/10 | 5477 days | 1% |
| Holly Cave | 5/10 | 5477 days | 1% |
| J Palmer | 6/10 | 5481 days | 1% |
| Liz & Jim | 10/10 | 5483 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5485 days | 1% |
| Simon Vickers | 2/10 | 5488 days | 1% |
| Leslie | 8/10 | 5501 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5502 days | 1% |
| Selina Mueller | 7/10 | 5503 days | 1% |
| Tamlin Barton | 3/10 | 5504 days | 1% |
| Cara Dungay | 8/10 | 5505 days | 1% |
| Bottcher | 10/10 | 5505 days | 1% |
| Alexandra | 10/10 | 5506 days | 1% |
| Philipp Rau | 7/10 | 5508 days | 1% |
| Dan Aldridge | 9/10 | 5510 days | 1% |
| John Allen | 8/10 | 5512 days | 1% |
| Curtis Penner | 8/10 | 5512 days | 1% |
| Brandt | 8/10 | 5514 days | 1% |
| Nadia Husain | 5/10 | 5517 days | 1% |
| T J Andrews | 6/10 | 5533 days | 1% |
| Charli Skinner | 7/10 | 5784 days | 1% |
| Carl_Larsen | 10/10 | 5793 days | 1% |
| Susan & Richard | 10/10 | 5854 days | 1% |
| Rik | 9/10 | 5855 days | 1% |
| Jonathan Martin | 7/10 | 5857 days | 1% |
| Gunda G | 9/10 | 5862 days | 1% |
| Aaron | 8/10 | 5864 days | 1% |
| Will Jemma | 6/10 | 5867 days | 1% |
| Christen Hans | 10/10 | 5868 days | 1% |
| Monica and Danie. | 7/10 | 5876 days | 1% |
| Stephen | 5/10 | 5878 days | 1% |
| Susan | 10/10 | 5878 days | 1% |
| snodge | 8/10 | 5882 days | 1% |
| Bo Moenstead | 9/10 | 5891 days | 1% |
| Alain Deslandres | 8/10 | 5895 days | 1% |
| Jakob Jurgen | 10/10 | 5896 days | 1% |
| EA Anders | 8/10 | 5899 days | 1% |
| Helen and Hans Walser | 1/10 | 5902 days | 1% |
| kevinp | 8/10 | 5925 days | 1% |
| warrenp | 9/10 | 5929 days | 1% |
| braunweiler | 9/10 | 5933 days | 1% |
| pimn | 9/10 | 5938 days | 1% |
| asiacritics | 7/10 | 5944 days | 1% |
| Chris Mackamul | 8/10 | 5951 days | 1% |
| Debbie Rathbone | 10/10 | 5951 days | 1% |
| Lisette X | 9/10 | 5952 days | 1% |
| Martin | 10/10 | 5954 days | 1% |
| Thomas Willi | 10/10 | 5954 days | 1% |
| Elodie | 7/10 | 5955 days | 1% |
| richardh | 7/10 | 6069 days | 1% |
| trvlbug | 8/10 | 6097 days | 1% |
| glennandjen | 10/10 | 6158 days | 1% |
| BryonyS | 9/10 | 6176 days | 1% |
| Marion | 9/10 | 6192 days | 1% |
| Mikey | 7/10 | 6193 days | 1% |
| Richard Komzik | 6/10 | 6194 days | 1% |
| Michael Walsall | 10/10 | 6198 days | 1% |
| Anna | 8/10 | 6212 days | 1% |
| Abigail | 7/10 | 6212 days | 1% |
| lannie | 7/10 | 6221 days | 1% |
| SimonR | 8/10 | 6222 days | 1% |
| SonjaG | 7/10 | 6222 days | 1% |
| Chris | 8/10 | 6228 days | 1% |
| AurelieD | 8/10 | 6235 days | 1% |
| Yunker | 10/10 | 6236 days | 1% |
| Andrew | 8/10 | 6238 days | 1% |
| Erin | 9/10 | 6238 days | 1% |
| Christopher Gallaga | 8/10 | 6244 days | 1% |
| Amy | 10/10 | 6250 days | 1% |
| Shona | 8/10 | 6250 days | 1% |
| plumbaum | 9/10 | 6252 days | 1% |
| Sandra | 10/10 | 6260 days | 1% |
| Evangelista | 8/10 | 6260 days | 1% |
| Oliver | 5/10 | 6262 days | 1% |
| Kat | 9/10 | 6292 days | 1% |
| Lisa | 8/10 | 6319 days | 1% |
| siobhan | 8/10 | 6321 days | 1% |
| Alice | 8/10 | 6321 days | 1% |
| NORTZ | 7/10 | 6349 days | 1% |
| Stefan | 8/10 | 6352 days | 1% |
| Hugh Trenchard | 9/10 | 6368 days | 1% |
| Niamh | 4/10 | 6374 days | 1% |
| Jenny | 9/10 | 6398 days | 1% |
| Louise | 8/10 | 6407 days | 1% |
| Peddy | 10/10 | 6417 days | 1% |
| Katie Wise | 8/10 | 6420 days | 1% |
| Thomas Bachmann | 8/10 | 6436 days | 1% |
| Daniala | 8/10 | 6455 days | 1% |
| Tom Ben | 9/10 | 6559 days | 1% |
| Sarah Maudsley | 8/10 | 6574 days | 1% |
| Alan Bellerby | 8/10 | 6574 days | 1% |
| Tina Daly | 5/10 | 6580 days | 1% |
| John Woodrow | 8/10 | 6589 days | 1% |
| Ernst Seter | 9/10 | 6589 days | 1% |
| Jim Curley | 7/10 | 6600 days | 1% |
| Daniel | 7/10 | 6601 days | 1% |
| Marc Hertogs | 7/10 | 6604 days | 1% |
| Laura Sutton | 5/10 | 6628 days | 1% |
| Jeroen | 5/10 | 6630 days | 1% |
| Mum! | 6/10 | 6630 days | 1% |
| Gail | 9/10 | 6634 days | 1% |
| Heike Julia | 6/10 | 6635 days | 1% |
| Lanni | 8/10 | 6635 days | 1% |
| Amanda Finger | 7/10 | 6636 days | 1% |
| Desiree Muri | 7/10 | 6636 days | 1% |
| Jan Grzejik | 8/10 | 6663 days | 1% |
| Wouter Ewalts | 8/10 | 6670 days | 1% |
| Matilde | 6/10 | 6678 days | 1% |
| Kim | 6/10 | 6875 days | 1% |
| Gillian | 8/10 | 6917 days | 1% |
| Denise Nick | 6/10 | 6927 days | 1% |
| ranker_110 | 8/10 | 6946 days | 1% |
| Jasper | 7/10 | 6953 days | 1% |
| Mary | 8/10 | 6953 days | 1% |
| Lucy | 6/10 | 6953 days | 1% |
| Lukas | 8/10 | 6964 days | 1% |
| Hanna | 7/10 | 6966 days | 1% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.03% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 57 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.97% |
| 198 | -3.99% |
| 199 | -4.01% |
| 200 | -4.03% |
| 201 | -4.05% |
| 202 | -4.07% |
| 203 | -4.09% |
| … | … |
Balancing Adjustment
6.10% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
78%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.